1 // SPDX-License-Identifier: GPL-2.0-only
26  * - If the voltage on a rail is above the "1.8" voltage (1.98V) we'll tell the
28  * - If the voltage on a rail is above the "3.3" voltage (3.6V) we'll consider
79 static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply,  in rockchip_iodomain_write()  argument
82 	struct rockchip_iodomain *iod = supply->iod;  in rockchip_iodomain_write()
88 	val <<= supply->idx;  in rockchip_iodomain_write()
90 	/* apply hiword-mask */  in rockchip_iodomain_write()
91 	val |= (BIT(supply->idx) << 16);  in rockchip_iodomain_write()
93 	ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val);  in rockchip_iodomain_write()
95 		dev_err(iod->dev, "Couldn't write to GRF\n");  in rockchip_iodomain_write()
104 	struct rockchip_iodomain_supply *supply =  in rockchip_iodomain_notify()  local
125 		uV = max_t(unsigned long, pvc_data->old_uV, pvc_data->max_uV);  in rockchip_iodomain_notify()
133 	dev_dbg(supply->iod->dev, "Setting to %d\n", uV);  in rockchip_iodomain_notify()
136 		dev_err(supply->iod->dev, "Voltage too high: %d\n", uV);  in rockchip_iodomain_notify()
142 	ret = rockchip_iodomain_write(supply, uV);  in rockchip_iodomain_notify()
146 	dev_dbg(supply->iod->dev, "Setting to %d done\n", uV);  in rockchip_iodomain_notify()
155 	/* if no VCCIO6 supply we should leave things alone */  in px30_iodomain_init()
156 	if (!iod->supplies[PX30_IO_VSEL_VCCIO6_SUPPLY_NUM].reg)  in px30_iodomain_init()
164 	ret = regmap_write(iod->grf, PX30_IO_VSEL, val);  in px30_iodomain_init()
166 		dev_warn(iod->dev, "couldn't update vccio6 ctrl\n");  in px30_iodomain_init()
174 	/* if no flash supply we should leave things alone */  in rk3288_iodomain_init()
175 	if (!iod->supplies[RK3288_SOC_FLASH_SUPPLY_NUM].reg)  in rk3288_iodomain_init()
183 	ret = regmap_write(iod->grf, RK3288_SOC_CON2, val);  in rk3288_iodomain_init()
185 		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");  in rk3288_iodomain_init()
193 	/* if no vccio2 supply we should leave things alone */  in rk3328_iodomain_init()
194 	if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg)  in rk3328_iodomain_init()
202 	ret = regmap_write(iod->grf, RK3328_SOC_CON4, val);  in rk3328_iodomain_init()
204 		dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n");  in rk3328_iodomain_init()
212 	/* if no flash supply we should leave things alone */  in rk3368_iodomain_init()
213 	if (!iod->supplies[RK3368_SOC_FLASH_SUPPLY_NUM].reg)  in rk3368_iodomain_init()
221 	ret = regmap_write(iod->grf, RK3368_SOC_CON15, val);  in rk3368_iodomain_init()
223 		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");  in rk3368_iodomain_init()
231 	/* if no pmu io supply we should leave things alone */  in rk3399_pmu_iodomain_init()
232 	if (!iod->supplies[RK3399_PMUGRF_VSEL_SUPPLY_NUM].reg)  in rk3399_pmu_iodomain_init()
240 	ret = regmap_write(iod->grf, RK3399_PMUGRF_CON0, val);  in rk3399_pmu_iodomain_init()
242 		dev_warn(iod->dev, "couldn't update pmu io iodomain ctrl\n");  in rk3399_pmu_iodomain_init()
255 		"vccio-oscgpi",
283  * On the rk3188 the io-domains are handled by a shared register with the
284  * lower 8 bits being still being continuing drive-strength settings.
436 		.compatible = "rockchip,px30-io-voltage-domain",
440 		.compatible = "rockchip,px30-pmu-io-voltage-domain",
444 		.compatible = "rockchip,rk3188-io-voltage-domain",
448 		.compatible = "rockchip,rk3228-io-voltage-domain",
452 		.compatible = "rockchip,rk3288-io-voltage-domain",
456 		.compatible = "rockchip,rk3328-io-voltage-domain",
460 		.compatible = "rockchip,rk3368-io-voltage-domain",
464 		.compatible = "rockchip,rk3368-pmu-io-voltage-domain",
468 		.compatible = "rockchip,rk3399-io-voltage-domain",
472 		.compatible = "rockchip,rk3399-pmu-io-voltage-domain",
476 		.compatible = "rockchip,rv1108-io-voltage-domain",
480 		.compatible = "rockchip,rv1108-pmu-io-voltage-domain",
489 	struct device_node *np = pdev->dev.of_node;  in rockchip_iodomain_probe()
496 		return -ENODEV;  in rockchip_iodomain_probe()
498 	iod = devm_kzalloc(&pdev->dev, sizeof(*iod), GFP_KERNEL);  in rockchip_iodomain_probe()
500 		return -ENOMEM;  in rockchip_iodomain_probe()
502 	iod->dev = &pdev->dev;  in rockchip_iodomain_probe()
506 	iod->soc_data = match->data;  in rockchip_iodomain_probe()
508 	parent = pdev->dev.parent;  in rockchip_iodomain_probe()
509 	if (parent && parent->of_node) {  in rockchip_iodomain_probe()
510 		iod->grf = syscon_node_to_regmap(parent->of_node);  in rockchip_iodomain_probe()
512 		dev_dbg(&pdev->dev, "falling back to old binding\n");  in rockchip_iodomain_probe()
513 		iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");  in rockchip_iodomain_probe()
516 	if (IS_ERR(iod->grf)) {  in rockchip_iodomain_probe()
517 		dev_err(&pdev->dev, "couldn't find grf regmap\n");  in rockchip_iodomain_probe()
518 		return PTR_ERR(iod->grf);  in rockchip_iodomain_probe()
522 		const char *supply_name = iod->soc_data->supply_names[i];  in rockchip_iodomain_probe()
523 		struct rockchip_iodomain_supply *supply = &iod->supplies[i];  in rockchip_iodomain_probe()  local
530 		reg = devm_regulator_get_optional(iod->dev, supply_name);  in rockchip_iodomain_probe()
534 			/* If a supply wasn't specified, that's OK */  in rockchip_iodomain_probe()
535 			if (ret == -ENODEV)  in rockchip_iodomain_probe()
537 			else if (ret != -EPROBE_DEFER)  in rockchip_iodomain_probe()
538 				dev_err(iod->dev, "couldn't get regulator %s\n",  in rockchip_iodomain_probe()
548 			dev_err(iod->dev, "Can't determine voltage: %s\n",  in rockchip_iodomain_probe()
554 			dev_crit(iod->dev,  in rockchip_iodomain_probe()
557 			ret = -EINVAL;  in rockchip_iodomain_probe()
561 		/* setup our supply */  in rockchip_iodomain_probe()
562 		supply->idx = i;  in rockchip_iodomain_probe()
563 		supply->iod = iod;  in rockchip_iodomain_probe()
564 		supply->reg = reg;  in rockchip_iodomain_probe()
565 		supply->nb.notifier_call = rockchip_iodomain_notify;  in rockchip_iodomain_probe()
567 		ret = rockchip_iodomain_write(supply, uV);  in rockchip_iodomain_probe()
569 			supply->reg = NULL;  in rockchip_iodomain_probe()
574 		ret = regulator_register_notifier(reg, &supply->nb);  in rockchip_iodomain_probe()
576 			dev_err(&pdev->dev,  in rockchip_iodomain_probe()
578 			supply->reg = NULL;  in rockchip_iodomain_probe()
583 	if (iod->soc_data->init)  in rockchip_iodomain_probe()
584 		iod->soc_data->init(iod);  in rockchip_iodomain_probe()
589 	for (i = MAX_SUPPLIES - 1; i >= 0; i--) {  in rockchip_iodomain_probe()
590 		struct rockchip_iodomain_supply *io_supply = &iod->supplies[i];  in rockchip_iodomain_probe()
592 		if (io_supply->reg)  in rockchip_iodomain_probe()
593 			regulator_unregister_notifier(io_supply->reg,  in rockchip_iodomain_probe()
594 						      &io_supply->nb);  in rockchip_iodomain_probe()
605 	for (i = MAX_SUPPLIES - 1; i >= 0; i--) {  in rockchip_iodomain_remove()
606 		struct rockchip_iodomain_supply *io_supply = &iod->supplies[i];  in rockchip_iodomain_remove()
608 		if (io_supply->reg)  in rockchip_iodomain_remove()
609 			regulator_unregister_notifier(io_supply->reg,  in rockchip_iodomain_remove()
610 						      &io_supply->nb);  in rockchip_iodomain_remove()
620 		.name  = "rockchip-iodomain",
627 MODULE_DESCRIPTION("Rockchip IO-domain driver");